moran



(No Model.) 2 Sheets-Sheet 1.

W. MORAN.

PORTABLE TUBULAR BOILER.

No. 318,128. Patented May 19, 1885.

Attorney (No Model.) 2 Sheets-Sheet 2.

W. MORAN.

PORTABLE TUBULAR BOILER.

No. 318,128. Patented May 19, 1885.

WITNESSES .dttorney N PETERS. PhuIv-Lilhugnpher. Wflihingvn, D. c.

UNITED STATES PATENT OFFICE.

VILLIAM MORAN, OF ERIE, PENNSYLVANIA, ASSIGNOR TO THE ERIE CITY IRON\VORKS, OF SAME PLACE.

PORTABLE TUBULAR BOILER.

SPECIFICATION forming part of Letters Patent No. 318,128, dated May 19,1885.

Application filed Dcccmbcr Q, 1894. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM llIORAN, of Erie, county of Erie, and Stateof Pennsyl vania,'haveinventedanewanduseful Improvement in PortableTubular Boilers, of which the following is afull, clear, and exactdescription, reference being had to the accompanying drawings, makingpart of this specification. My invention relates to that class ofboilers known as return-tube tubular boilers, in which the productsofcombnstion, after passing through tubes extending from the fire-potthrough the boiler to a chamber at the rear end thereof, are returnedthrough the boiler through tnbes'extending' from said chamber and overthe crown-sheet of the fire-pot to the smoke-box in front of theboiler,and communicating with the Smokestack; and it consists in a novelconstruction of the boiler whereby it is made portable, complete initself, and provided with a removable, brick-lined firepot, facilitatingits handling and transportation, and in certain detailsof constructionand arrangement of parts hereinafter fully explained, with reference tothe accompany- .ing drawings, in which Figure 1 represents a verticallongitudinal section through my improved boiler; Fig. 2,

a rear elevation of the same, and Fig. 3 a vertical transverse sectionthrough the boiler and A indicates the shell of theboiler, which in itsforward portion, A, overlying the fire-pot B, is cylindricalin form, itslower surface constituting the crown-sheet of the fire-pot, in the formof an inverted arcl1,as is shown in Fig. 3, while the portion A in rearof the fire-pot is extended downward, to form in part the rear wall ofthe latter, and assume an elliptical form, having its sides flattened,as shown. The forward end of the part A is provided with a perforatedhead or tube-sheet, G, cylindrical in form, and provided with aforwardlyturned annular flange, 0, through which it is riveted to theshell which extends forward of said flange to form the cylindrical shellof the smoke-box D.

To the lower side of the rear end of the cylindrical portion A issecured a crescentshaped perforated head or tube-sheet, 0, forming theforward end of the portion A pendout below the part A, and in part alsothe rear wall of the fire-pot. This tube-sheet is provided on itsconcave upper edge with a forwardly-turned flange, 0, through which it 5is secured to the cylindrical portion A of the shell, and upon its outerconvex edge with a rearwardly-turned flangefc", through which it issecured to the forward end of the lower part of the elliptical portion Aof the shell.

jointviz., that at 0, between the head Gand cylindrical portion A of theshell-will be exposed to the direct action of the heat from thefire-pot, and that being covered by the water 7.5 in the boiler greatdurability of the joints of the boiler is secured.

The shell is extended in rear of the tubesheet to form a chamber, E,which is closed by a sheet-metal plate or head, 1 secured to the rearend of the shell in any suitable man.-

' ner, and provided at with a man-hole and hinged door, through whichaccess may behad to the rear tube-sheet, and rear ends of the tubeterminating therein, or for cleansing the chamber E.

The tube-sheet C and rear wall, E, have secured to their adjacentsides,above the plane of the tubes in the boiler and near the waterline in thelatter, transverse angle-irons c and c, and between said angle-irons oneor more stay rods or bars, f, extend from side to side of the boiler andserve, in connection with the angle-irons, to support a horizontalpartition, F, offi1'e-brick,whicl1 serves to deflect the pro- 5 ducts ofcombustion into the return-tubes, hereinafter referred to, and toprevent the formation of eddies in the current thereof, and consequentobstruction in the draft. The flanges and rod or rods f also serve tostay and ICQ stiffen the sides and ends of the shell.

The smoke-box D is closed at its forward 0 and return-tubes I) extendforward from end in a manner similar to the rear end of the chamber E,and may in like -manner be provided with a man-hole and door for givingaccess to its contents or the forward ends of the return-tubes. It isadapted to receive at d the Smokestack, which may be of any usual orpreferred form.

Fire-tubes a extend from the tube-sheet 0 below the crown-sheet of thefire-pot back to the chamber E, terminating in the tube-sheet thechamber E over the crown-sheet of the fire-pot to the smoke box orchamber 1), having their ends secured in the tube-sheets G and 0". Thetubes to, leading directly from the fire-potB, are preferably madelarger than the return-tubes b. I compensate for the reduced size of thereturn-tubes by an increase'in their number as compared with the tubesa, there by distributing the products of combustion more evenly throughthe boiler in their retur'nor forward movement and securing the bestresults attainable therefrom. The chamber E, itwill be seen, serves toconnect the tubes awith'the returlrtubes I).

The fire-pot is made separate from'theboiler-shell, extending under thecylindrical portion A of the latter, and sufiiciently over the forwardend of the part A to adapt its rear wall, B, to be secured thereto. Itis provided with suitable flanges, through which it is secured to theshell in any suitable manner, and the walls G of the fire-pot shell,where these flanges unite with the shell of the boiler, have offsetsformed in them at g, or are bent, as shown, for giving thefire-potsliell aslightly increased width, as compared with the boiler,sufficient to accommodate a lining of fire-brick, H, and at the sametime leave the entire lower surface or half ofportionA ofthe shellforming the crown-sheet of the fire-pot exposed to the direct action ofthe fire. The inner faees'of the walls G of the fire-pot shell havehorizontal angle-iron strips or ledges and g secured to them throughpendent flanges, the ledge or shelf portions of irons g having each anupturned elbow, and the fire-brick, being correspondingly grooved ontheir lower edges and beveled from each side upward, on their upperedges, fit between said ledges' and form, as it were, atongue-and-groove connectiontherewith, such as to effectually hold thebricks in place. The lower irons, 9, have an upturned flange, g, ontheir inner edges, which serves to. hold the bricks in place thereon,and the others may be similarly formed, if desired; but the elbow formdescribed is preferred, as it serves the desired purpose with less ofthe metal exposed to the fire than in the form shown at g".

The fire-pot is provided with the usual fire and ash-pit doors, and witha grate, I, which may be of any usual or preferred construction, and atits sides and front and also at its rear end below the boiler thefire-pot shell is protected by fire-brick, at all points not protectedby the water in the boiler, and so arranged, as shown, as to protect allof the joints between the fire-pot and boiler except that at c, as aboveexplained.

The boiler is provided at J with a steamdome, of any usual or preferredconstruction, and has its rear end supported in an angular bracket, K,provided at its upper end with a concave seat at 7;, conforming to thelower face of the boiler resting therein. The arms or legs of thisbracket extend obliquely downward from the seat I'd-and being secured tothe base-plates or timbers to which'the other supporting-brackets arefastened, they serve to firmly brace and uphold the rear end of theboiler.

I am aware that return-tube tubular boilers have been employed,constructed with cylindrical and elliptical portions, and also with achamber connecting the direct and return flues, and, further, thatremovable bricklined firepots have been employed. These elements I donot claim specifically; but,

Having now described my invention,I claim as new 1. The combination, ina portable returntube tubular boiler having the cylindrical portion overthe fire-pot, the elliptical portion in rear thereof, the direct andreturn tubes,

and the chamber connecting said tubes, as described, of the removablebrick-lined fire-pot and the smoke-box, all constructed and an rangedsubstantially as described.

2. The combination, in a portable returntube tubular boiler havingthe'cylindrical portion over thefire-pot, an elliptical portion in rearthereof, the direct and return tubes, and the chamber connecting saiddirect and return tubes, of the removable deflecting-partition arrangedin said chamber above the plane of the return-tubes, the smoke-box, andthe removable brick-lined fire-pot, substantially as described.

In testimony whereof I have hereunto set my hand.

' WM. MORAN.

\Vitnesses:

O. S. ORossnR, HENRY L. PERKINS.

ICO

